DARK FLUID: A UNIFIED FRAMEWORK FOR MODIFIED NEWTONIAN DYNAMICS, DARK MATTER, AND DARK ENERGY

Hongsheng, Zhao

doi:10.1088/0004-637X/712/1/130

Title: DARK FLUID: A UNIFIED FRAMEWORK FOR MODIFIED NEWTONIAN DYNAMICS, DARK MATTER, AND DARK ENERGY

Full Record
Other Related Research

Abstract

Empirical theories of dark matter (DM) like modified Newtonian dynamics (MOND) gravity and of dark energy (DE) like f(R) gravity were motivated by astronomical data. But could these theories be branches rooted from a more general and hence generic framework? Here we propose a very generic Lagrangian of such a framework based on simple dimensional analysis and covariant symmetry requirements, and explore various outcomes in a top-down fashion. The desired effects of quintessence plus cold DM particle fields or MOND-like scalar field(s) are shown to be largely achievable by one vector field only. Our framework preserves the covariant formulation of general relativity, but allows the expanding physical metric to be bent by a single new species of dark fluid flowing in spacetime. Its non-uniform stress tensor and current vector are simple functions of a vector field with variable norm, not coupled with the baryonic fluid and the four-vector potential of the photon fluid. The dark fluid framework generically branches into a continuous spectrum of theories with DE and DM effects, including the f(R) gravity, tensor-vector-scalar-like theories, Einstein-Aether, and nuLAMBDA theories as limiting cases. When the vector field degenerates into a pure scalar field, we obtain the physics for quintessence. Choicesmore »« less

Authors:

Hongsheng, Zhao ^[1]

Scottish University Physics Alliance, University of St. Andrews, KY16 9SS (United Kingdom)

Publication Date:: Sat Mar 20 00:00:00 EDT 2010

OSTI Identifier:: 21394277

Resource Type:: Journal Article

Journal Name:: Astrophysical Journal

Additional Journal Information:: Journal Volume: 712; Journal Issue: 1; Other Information: DOI: 10.1088/0004-637X/712/1/130; Journal ID: ISSN 0004-637X

Country of Publication:: United States

Language:: English

Subject:: 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BARYONS; CAUSALITY; COSMIC PHOTONS; COSMOLOGICAL CONSTANT; COSMOLOGY; GALAXIES; GENERAL RELATIVITY THEORY; GRAVITATION; LAGRANGIAN FUNCTION; METRICS; NONLUMINOUS MATTER; NUCLEOSYNTHESIS; SCALAR FIELDS; SPACE-TIME; SPECTRA; VECTOR FIELDS; VECTORS; BOSONS; COSMIC RADIATION; ELEMENTARY PARTICLES; FERMIONS; FIELD THEORIES; FUNCTIONS; HADRONS; IONIZING RADIATIONS; MASSLESS PARTICLES; MATTER; PHOTONS; RADIATIONS; RELATIVITY THEORY; SYNTHESIS; TENSORS

Citation Formats


                    Hongsheng, Zhao, and Li Baojiu, E-mail: hz4@st-andrews.ac.u, E-mail: b.li@damtp.cam.ac.u. DARK FLUID: A UNIFIED FRAMEWORK FOR MODIFIED NEWTONIAN DYNAMICS, DARK MATTER, AND DARK ENERGY.  United States: N. p., 2010. 
        Web.  doi:10.1088/0004-637X/712/1/130.

Copy to clipboard


                    Hongsheng, Zhao, & Li Baojiu, E-mail: hz4@st-andrews.ac.u, E-mail: b.li@damtp.cam.ac.u. DARK FLUID: A UNIFIED FRAMEWORK FOR MODIFIED NEWTONIAN DYNAMICS, DARK MATTER, AND DARK ENERGY.  United States.  https://doi.org/10.1088/0004-637X/712/1/130

Copy to clipboard


                    Hongsheng, Zhao, and Li Baojiu, E-mail: hz4@st-andrews.ac.u, E-mail: b.li@damtp.cam.ac.u. 2010.  
        "DARK FLUID: A UNIFIED FRAMEWORK FOR MODIFIED NEWTONIAN DYNAMICS, DARK MATTER, AND DARK ENERGY".  United States.  https://doi.org/10.1088/0004-637X/712/1/130.

Copy to clipboard


                    
@article{osti_21394277,

  title        = {DARK FLUID: A UNIFIED FRAMEWORK FOR MODIFIED NEWTONIAN DYNAMICS, DARK MATTER, AND DARK ENERGY},

  author       = {Hongsheng, Zhao and Li Baojiu, E-mail: hz4@st-andrews.ac.u, E-mail: b.li@damtp.cam.ac.u},

  abstractNote = {Empirical theories of dark matter (DM) like modified Newtonian dynamics (MOND) gravity and of dark energy (DE) like f(R) gravity were motivated by astronomical data. But could these theories be branches rooted from a more general and hence generic framework? Here we propose a very generic Lagrangian of such a framework based on simple dimensional analysis and covariant symmetry requirements, and explore various outcomes in a top-down fashion. The desired effects of quintessence plus cold DM particle fields or MOND-like scalar field(s) are shown to be largely achievable by one vector field only. Our framework preserves the covariant formulation of general relativity, but allows the expanding physical metric to be bent by a single new species of dark fluid flowing in spacetime. Its non-uniform stress tensor and current vector are simple functions of a vector field with variable norm, not coupled with the baryonic fluid and the four-vector potential of the photon fluid. The dark fluid framework generically branches into a continuous spectrum of theories with DE and DM effects, including the f(R) gravity, tensor-vector-scalar-like theories, Einstein-Aether, and nuLAMBDA theories as limiting cases. When the vector field degenerates into a pure scalar field, we obtain the physics for quintessence. Choices of parameters can be made to pass Big Bang nucleosynthesis, parameterized post-Newtonian, and causality constraints. In this broad setting we emphasize the non-constant dynamical field behind the cosmological constant effect, and highlight plausible corrections beyond the classical MOND predictions.},

  doi          = {10.1088/0004-637X/712/1/130},

  url          = {https://www.osti.gov/biblio/21394277},
  journal      = {Astrophysical Journal},

  issn         = {0004-637X},

  number       = 1,

  volume       = 712,

  place        = {United States},

  year         = {Sat Mar 20 00:00:00 EDT 2010},

  month        = {Sat Mar 20 00:00:00 EDT 2010}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1088/0004-637X/712/1/130

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Reconciling MOND and dark matter?

Journal Article Bruneton, Jean-Philippe; Liberati, Stefano; Sindoni, Lorenzo; ... - Journal of Cosmology and Astroparticle Physics

Observations of galaxies suggest a one-to-one analytic relation between the inferred gravity of dark matter at any radius and the enclosed baryonic mass, a relation summarized by Milgrom's law of modified Newtonian dynamics (MOND). However, present-day covariant versions of MOND usually require some additional fields contributing to the geometry, as well as an additional hot dark matter component to explain cluster dynamics and cosmology. Here, we envisage a slightly more mundane explanation, suggesting that dark matter does exist but is the source of MOND-like phenomenology in galaxies. We assume a canonical action for dark matter, but also add an interactionmore »« less
https://doi.org/10.1088/1475-7516/2009/03/021
GravitoMagnetic force in modified Newtonian dynamics

Journal Article Exirifard, Qasem - Journal of Cosmology and Astroparticle Physics

We introduce the Gauge Vector-Tensor (GVT) theory by extending the AQUAL's approach to the GravitoElectroMagnetism (GEM) approximation of gravity. GVT is a generally covariant theory of gravity composed of a pseudo Riemannian metric and two U(1) gauge connections that reproduces MOND in the limit of very weak gravitational fields while remains consistent with the Einstein-Hilbert gravity in the limit of strong and Newtonian gravitational fields. GVT also provides a simple framework to study the GEM approximation to gravity. We illustrate that the gravitomagnetic force at the edge of a galaxy can be in accord with either GVT or ΛCDM butmore »« less
https://doi.org/10.1088/1475-7516/2013/08/046
Testing dark matter and modifications to gravity using local Milky Way observables

Journal Article Lisanti, Mariangela; Moschella, Matthew; Outmezguine, Nadav; ... - Physical Review D

Galactic rotation curves are often considered the first robust evidence for the existence of dark matter. Yet, even in the presence of a dark matter halo, other galactic-scale observations, such as the Baryonic Tully-Fisher Relation and the Radial Acceleration Relation, remain challenging to explain. This has motivated long-distance, infrared modifications to gravity as an alternative to the dark matter hypothesis as well as various DM theories with similar phenomenology. In general, the standard lore has been that any model that reduces to the phenomenology of MOdified Newtonian Dynamics (MOND) on galactic scales explains essentially all galaxy-scale observables. We present amore »« less
Cited by 16
https://doi.org/10.1103/PhysRevD.100.083009

Full Text Available
Can MONDian vector theories explain the cosmic speed up?

Journal Article Cardone, Vincenzo; Radicella, Ninfa - Physical Review. D, Particles Fields

Generalized Einstein-Aether vector field models have been shown to provide, in the weak field regime, modifications to gravity which can be reconciled with the successful modified Newtonian dynamics (MOND) proposal. Very little is known, however, on the function F(K) defining the vector field Lagrangian so that an analysis of the viability of such theories at the cosmological scales has never been performed. As a first step along this route, we rely on the relation between F(K) and the MOND interpolating function {mu}(a/a{sub 0}) to assign the vector field Lagrangian thus obtaining what we refer to as MONDian vector models. Sincemore »« less
https://doi.org/10.1103/PHYSREVD.80.063515
Comparing different realizations of modified Newtonian dynamics: Virial theorem and elliptical shells

Journal Article Hongsheng, Zhao; Famaey, Benoit - Physical Review. D, Particles Fields

There exists several modified gravity theories designed to reproduce the empirical Milgrom's formula, modified Newtonian dynamics (MOND). Here we derive analytical results in the context of the static weak-field limit of two of them (bimetric MOND, leading for a given set of parameters to the quasilinear MOND, and Bekenstein's Tensor-Vector-Scalar). In this limit, these theories are constructed to give the same force field for spherical symmetry, but their predictions generally differ out of it. However, for certain realizations of these theories (characterized by specific choices for their free functions), the binding potential-energy of a system is increased, compared to itsmore »« less
https://doi.org/10.1103/PHYSREVD.81.087304

Similar Records